package hp;

import java.math.BigInteger;

public class BigIntegerDemo {
    public static void main(String[] args) {
        System.out.println(54321 * 54321);
        System.out.println(Integer.toString(999999, 30));//0-9a-z
        System.out.println(Integer.MAX_VALUE);//21��
        System.out.println(Long.MAX_VALUE);//900����
        BigInteger a = new BigInteger("111111111111111111111111111111111111111111");
        System.out.println(a.pow(2));

    }
}
